Search only in titles Edit Sub-Tier for Subcontractors Navigate to the Edit Sub-Tier Page From the Compliance menu at the top of the Project Home page or Period Home page, choose Edit Sub-Tier. From the Manage VAT Invoices or View VAT Invoice Status page, choose the Edit Sub-Tier link from the drop-down next to the Sub-Tier to edit. Next: Manage VAT Invoices for Subcontractors